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window.paypal .Buttons({ async createOrder() { try { const response = await fetch("/api/orders", { method: "POST", headers: { "Content-Type": "application/json", }, // use the "body" param to optionally pass additional order information // like product ids and quantities body: JSON.stringify({ cart: [ { id: "YOUR_PRODUCT_ID", quantity: "YOUR_PRODUCT_QUANTITY", }, ], }), }); const orderData = await response.json(); if (orderData.id) { return orderData.id; } else { const errorDetail = orderData?.details?.[0]; const errorMessage = errorDetail ?`${errorDetail.issue} ${errorDetail.description} (${orderData.debug_id})` : JSON.stringify(orderData); throw new Error(errorMessage); } } catch (error) { console.error(error); resultMessage(`Could not initiate PayPal Checkout...

${error}`); } }, async onApprove(data, actions) { try { const response = await fetch(`/api/orders/${data.orderID}/capture`, { method: "POST", headers: { "Content-Type": "application/json", }, }); const orderData = await response.json(); // Three cases to handle: // (1) Recoverable INSTRUMENT_DECLINED -> call actions.restart() // (2) Other non-recoverable errors -> Show a failure message // (3) Successful transaction -> Show confirmation or thank you message const errorDetail = orderData?.details?.[0]; if (errorDetail?.issue === "INSTRUMENT_DECLINED") { // (1) Recoverable INSTRUMENT_DECLINED -> call actions.restart() // recoverable state, per https://developer.paypal.com/docs/checkout/standard/customize/handle-funding-failures/ return actions.restart(); } else if (errorDetail) { // (2) Other non-recoverable errors -> Show a failure message throw new Error(`${errorDetail.description} (${orderData.debug_id})`); } else if (!orderData.purchase_units) { throw new Error(JSON.stringify(orderData)); } else { // (3) Successful transaction -> Show confirmation or thank you message // Or go to another URL: actions.redirect('thank_you.html'); const transaction = orderData?.purchase_units?.[0]?.payments?.captures?.[0] || orderData?.purchase_units?.[0]?.payments?.authorizations?.[0]; resultMessage( `Transaction ${transaction.status}: ${transaction.id}

See console for all available details`, ); console.log( "Capture result", orderData, JSON.stringify(orderData, null, 2), ); } } catch (error) { console.error(error); resultMessage( `Sorry, your transaction could not be processed...

${error}`, ); } }, }) .render("#paypal-button-container"); // Example function to show a result to the user. Your site's UI library can be used instead. function resultMessage(message) { const container = document.querySelector("#result-message"); container.innerHTML = message; }